So I had one of the "loose" keypads on my 8700g and I kinda liked the way it felt. Well now it doesn't move anymore and the left and right keys of the keypad aren't very tactile anymore. The "alt", "a", "q", and "enter""" keys don't feel like they push down when I push them. Any ideas why? Dirt? If i took the phone apart and cleaned it would that void the warranty? Is there anyway tmobile could tell I had opened the case?